public class Test3 {
    private static int count=0;
    public static void main(String[] args) throws InterruptedException {
        Object locker=new Object();
        Thread t1=new Thread(()->{
           for(int i=0;i<50000;i++){
               synchronized(locker){
                   count++;
               }
           }
        });
        Thread t2=new Thread(()->{
           for(int j=0;j<50000;j++) {
               synchronized (locker){
                   count++;
               }
           }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(count);
    }
}
